package com.nb;

import java.security.MessageDigest;
import java.util.*;
import java.util.concurrent.*;

/**
 * @author lihaoyang
 * @date 2022/9/16
 */
public class Test {


    public static void main(String[] args) {


        //SortedSet  TreeSet

        //CopyOnWriteArraySet

        //ConcurrentSkipListSet


        String s = string2MD5("123456");
        System.err.println(s);


    }


    public static String string2MD5(String inStr) {

        MessageDigest md5 = null;

        try {
            md5 = MessageDigest.getInstance("MD5");

        } catch (Exception e) {

            System.out.println(e.toString());

            e.printStackTrace();
            return "";
        }

        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)

            byteArray[i] = (byte) charArray[i];

        byte[] md5Bytes = md5.digest(byteArray);

        StringBuffer hexValue = new StringBuffer();

        for (int i = 0; i < md5Bytes.length; i++) {

            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16)

                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }

        return hexValue.toString();
    }

}





